<!doctype html>
<html lang="en-US">
<head>
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
<style type="text/css">
    .outer{
        overflow:auto;
    }
    .part1{
        height:200px;
    }
    .previewImage{
        position:fixed;
        height:100vh;
    }
</style>

<div class="outer">
    <div class="part1">
        <img class="previewImage" src="http://b.hiphotos.baidu.com/super/whfpf%3D425%2C260%2C50/sign=680400559c22720e7b9bb1ba1df63e74/4afbfbedab64034f19036731abc379310a551d3e.jpg" alt=""/>
    </div>
</div>

</body>
</html>